From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bartlomiej Zolnierkiewicz Subject: Re: Re: libata / IDE cs5536: 80c cable detect issue (and worse?) Date: Fri, 19 Jul 2013 12:40:38 +0200 Message-ID: <21479812.cJNm40xAqz@amdc1032> References: <20130718181355.GA31889@rhlx01.hs-esslingen.de> <20130718182541.GA30707@rhlx01.hs-esslingen.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7Bit Return-path: Received: from mailout1.samsung.com ([203.254.224.24]:16615 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934447Ab3GSKku (ORCPT ); Fri, 19 Jul 2013 06:40:50 -0400 In-reply-to: <20130718182541.GA30707@rhlx01.hs-esslingen.de> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Andreas Mohr Cc: Bartlomiej Zolnierkiewicz , "Martin K. Petersen" , Christian Gmeiner , linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org Hi, On Thursday, July 18, 2013 08:25:41 PM Andreas Mohr wrote: > Hi, > > forgot to mention that I had already added a libata.force=40c boot > after my 80c config issue discovery > which did successfully cause the "limiting to UDMA/33 due to 40c foo" dmesg > yet where there's now initial but strong confirmation via reports > that the resulting UDMA/33 limit did NOT manage to fix corruption issues, > thus it's more strongly likely that the "bound to ill-suited pata_amd driver" > (due to incorrectly configuring speeds, or due to not configuring speeds > at all due to possibly BIOS not providing emulation of PCI register accesses > to Geode bus, which would be properly supported by pata_cs5536 OTOH) > thing is the actual reason and might fix it (fingers crossed). UDMA/66 (and higher) requires 80-wire cable to work (if the vendor states that UDMA/66 is supported then UDMA/100 should also work on CS5536). UDMA/33 should work just fine with 40-wire cable. Therefore this indeed sounds more like wrong driver being selected issue than a cable problem. Best regards, -- Bartlomiej Zolnierkiewicz Samsung R&D Institute Poland Samsung Electronics